結(jié)構(gòu)鋼." />
牌號
|
等級
|
化學(xué)成分
|
脫氧方法
|
||||
C
|
Mn
|
Si
|
S
|
P
|
|||
不大于
|
|||||||
Q195
|
—
|
0.06~0.12
|
0.25~0.50
|
0.30
|
0.050
|
0.045
|
F、b、Z
|
Q215
|
A
|
0.09~0.15
|
0.25~0.55
|
0.30
|
0.050
|
0.045
|
F、b、Z
|
B
|
0.045
|
F、b、Z
|
|||||
Q235
|
A
|
0.14~0.22
|
0.30~0.65
|
0.30
|
0.050
|
0.045
|
F、b、Z
|
B
|
0.12~0.20
|
0.30~0.70
|
0.045
|
||||
C
|
≤0.18
|
0.35~0.18
|
0.040
|
0.040
|
Z
|
||
D
|
≤0.17
|
0.035
|
0.035
|
TZ
|
|||
Q255
|
A
|
0.18~0.28
|
0.40~0.70
|
0.30
|
0.050
|
0.045
|
F、b、Z
|
B
|
0.045
|
||||||
Q275
|
—
|
0.28~0.38
|
0.50~0.80
|
0.35
|
0.050
|
0.045
|
b、Z
|